Shelf lock



FIG. 1 is a lower perspective view of a shelf lock, showing my design;

FIG. 2 is a back upper perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front view thereof; and

FIG. 6 is a back view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a perspective view thereof, shown the article in it's environmental use.

The broken lines are for illustrative purpose only and form no part of the claimed design.

The details shown in broken lines are for illustrative purposes only and form no part of the claimed design. For example, the shelf bracket and the shelf are shown in broken lines for illustrative purposes only as mere examples of possible components for which the shelf lock may be used. The sizing and dimensions of the shelf lock to the shelf bracket and shelf form no part of the claimed design. 

The ornamental design for a shelf lock, as shown and described. 